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- W2098005649 abstract "One of the major therapeutic strategy in cystic fibrosis aims at developing modulators of cystic fibrosis transmembrane conductance regulator (CFTR) channels. We recently discovered methylglyoxal alpha-aminoazaheterocycle adducts, as a new family of CFTR inhibitors. In a structure-activity relationship study, we have now identified GPact-11a, a compound able not to inhibit but to activate CFTR. Here, we present the effect of GPact-11a on CFTR activity using in vitro (iodide efflux, fluorescence imaging and patch-clamp recordings), ex vivo (short-circuit current measurements) and in vivo (salivary secretion) experiments. We report that GPact-11a: 1) is an activator of CFTR in several airway epithelial cell lines; 2) activates rescued F508del-CFTR in nasal, tracheal, bronchial, pancreatic cell lines and in human CF ciliated epithelial cells, freshly dissociated from lung samples; 3) stimulates ex vivo the colonic chloride secretion and increases in vivo the salivary secretion in cftr(+/+) but not cftr(-/-) mice; and 4) is selective for CFTR because its effect is inhibited by CFTR(inh)-172, GlyH-101, glibenclamide and GPinh-5a. To conclude, this work identifies a selective activator of wild-type and rescued F508del-CFTR. This nontoxic and water-soluble agent represents a good candidate, alone or in combination with a F508del-CFTR corrector, for the development of a CFTR modulator in cystic fibrosis." @default.
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- W2098005649 date "2010-01-28" @default.
- W2098005649 modified "2023-10-11" @default.
- W2098005649 title "Identification of a novel water-soluble activator of wild-type and F508del CFTR: GPact-11a" @default.
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- W2098005649 doi "https://doi.org/10.1183/09031936.00122509" @default.
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